Medellín's urban forest miracle

Medellín transforms its urban landscape with green corridors, showing the world how to beat urban heat.

Peter Yeung reports for Reasons to be Cheerful.


In short:

  • Medellín's Green Corridors project has significantly lowered the city's temperature by planting trees and creating green spaces.
  • This initiative has not only cooled the city by 2°C in three years but also improved air quality and increased biodiversity.
  • The effort was led by the community, with support from city officials, and is seen as a model for other cities facing the heat island effect.

Key quote:

“Medellín grew at the expense of green spaces and vegetation. We built and built and built. There wasn’t a lot of thought about the impact on the climate. It became obvious that had to change."

— Pilar Vargas, a forest engineer working for City Hall

Why this matters:

Medellín's success in cooling its urban environment demonstrates a sustainable way to tackle the urban heat island effect, improving living conditions and health outcomes. As cities worldwide grapple with rising temperatures, this Colombian city's approach offers a blueprint for urban resilience and environmental stewardship.

Be sure to read about Tucson's ambitious tree planting goal aims to improve the health of residents, wildlife, and the watershed.

wind turbines in a row in a dry environment under white clouds and blue sky during daytime

Growth of wind and solar keeping fossil power in check

Surging wind and solar additions are meeting all of this year’s growth in global electricity demand, keeping fossil fuel use flat for the first time since the pandemic.

A row of data towers inside a data center

Manitoba’s AI data center push, explained

Manitoba — home of much hydro power and notoriously cold winters — says it’s perfectly positioned for a data center boom. Here’s what that means for the province.

A green and black northern leopard frog sitting in water

Can an imperiled frog stop oil drilling near Denver suburbs? Residents hope so

Threatened northern leopard frogs found near a proposed 32-well pad outside Aurora have become a central factor in residents’ push to block one of Colorado’s largest fossil fuel projects.

A garden shed with a patio in front of it

'I heat my Essex home with a data center in the shed'

An British couple testing a data-center-powered heating system say their energy costs have plummeted after replacing their gas boiler with a HeatHub that repurposes warmth generated by hundreds of mini-computers.

A husky dog with blue eyes on  leash looking away from the camera

The climate paradox of having a dog

My dog contributes to climate change. I love him anyway.
EPA administrator Lee Zeldin speaking with attendees at The People's Convention at Huntington Place in Detroit, Michigan.
Credit: Gage Skidmore/https://www.flickr.com/photos/gageskidmore/ Creative Commons https://creativecommons.org/licenses/by-sa/2.0/

Chemical giant, climate skeptics vie for seats on EPA science panel

The Science Advisory Board could influence the Trump administration's plans to revisit a host of regulations.
Cutting board adorned with fresh vegetables and fruit

Nutritionist Marion Nestle weighs in on 'What to Eat Now'

Marion Nestle says we need to rethink how we eat. She recommends "real food, processed as little as possible, with a big emphasis on plants." Her new book is What to Eat Now.
From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.